Daily Martyrology for May 24

In 450, St. Vincent of Lérins, monk. He is most known for a book he wrote called the Commonitorium, which includes criteria for discerning true Christian tradition.

In 592, St. Simeon the Younger, Stylite. He lived for 40 years on top of a pillar near Antioch.

In 1153, St. David of Scotland. He was the youngest son of King Malcolm and St. Margaret. He was orphaned at eight, raised in the court of Henry I, and became king of Scotland in 1124. He was an effective king and a strong supporter of the church. St. Aelred of Rievaulx (January 12), who served in his household before becoming a Cistercian, wrote a panegyric of him.

In Marrakesh, in Morocco, in 1631, John of Prado, martyr. He ministered among Christian slaves in Morocco. He was arrested, examined, shot with arrows, and then burned alive. When he continued to preach to his executioners, one crushed his head with a rock.